A place to discuss potentially promising methods of intelligence amplification in the broad sense of general methods, tools, diets, regimens, or substances that boost cognition (memory, creativity, focus, etc.): anything from SuperMemo to Piracetam to regular exercise to eating lots of animal fat to binaural beats, whether it works or not. Where's the highest expected value? What's easiest to make part of your daily routine? Hopefully discussion here will lead to concise top level posts describing what works for a more self-improvement-savvy Less Wrong.
Lists of potential interventions are great, but even better would be a thorough analysis of a single intervention: costs, benefits, ease, et cetera. This way the comment threads will be more structured and organized. Less Wrong is pretty confused about IA, so even if you're not an expert, a quick analysis or link to a metastudy about e.g. exercise could be very helpful.
Added: Adam Atlas is now hosting an IA wiki: BetterBrains! Bookmark it, add to it, make it awesome.
Most if not all of the comments so far are focused on individual intelligence augmentation.
I suspect there is big, juicy, low-hanging fruit in collective intelligence augmentation. We're pretty smart by ourselves but really dumb when we get together in groups, small and big.
For an interesting (if controversial) example of IA for groups, see Software For Your Head.
Morendil, Thank you for reminding me of this book! A technique I remember being described there is very attractive to me. My memory will mangle the details, but basically it is a convention by which either party in a discussion (say, party A in a discussion with party B) can call a point of order to ask the other party (in this case, B) to state A's position to A's satisfaction.
I have tried this some with mixed results, which I suspect could have been better with more preparatory groundwork. I'd love to hear of others' experiences.